linux-kernel - Re: [RFT] x86 acpi: normalize segment descriptor register on resume

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Message-ID: <487AD37A.2050903@zytor.com>
Date:	Sun, 13 Jul 2008 21:18:02 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Andy Lutomirski <luto@...ealbox.com>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Ingo Molnar <mingo@...e.hu>,
	public-kernel-testers-u79uwXL29TY76Z2rM5mHXA@...gmane.org,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	Pavel Machek <pavel@....cz>
Subject: Re: [RFT] x86 acpi: normalize segment descriptor register on resume

H. Peter Anvin wrote:
> 
> The most likely explanation for this is that the VESA BIOS expects to be 
> entered in Big Real Mode (*.limit = 0xffffffff) instead of ordinary Real 
> Mode.  Here is a completely untested patch which changes the segment 
> descriptors to Big Real Mode instead.  It would be worth testing out.
> 

... and here is one that actually has a prayer of actually working.

	-hpa

View attachment "linux-2.6.26-bigrm-wakeup.patch" of type "text/x-patch" (1271 bytes)